a long term change in the earths climate, especially a change due to an increase in the average atmospheric temperature
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action taken place to reduce or eliminate the long term risk to human life and property from natural hazards, such as building earthquake proof buildings or making international agreements about carbon reduction targets
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changes in the pathway of earth around the sun
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the period of geological time from about 2.6 million years ago to the present. It is characterized by the appearance and development of humans and includes the pleistocene and holocene epochs